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Table 5 Results of the human observer study

From: Minimum lesion detectability as a measure of PET system performance

Sig to noise Scanner 1 × 1 × 1 mm voxel 2 × 2 × 2 mm voxel 4 × 4 × 4 mm voxel
16 min 8 4 2 1 16 8 4 2 1 16 8 4 2 1
15:1 Gemini-TF NA NA NA NA NA 31 31 63 63 63 63 125 250 125 250
Vereos 31 31 31 63 125 31 31 63 63 125 31 63 63 63 125
710 31 63 63 63 125 31 63 63 63 125 31 63 63 63 125
mCT 31 63 63 63 63 31 31 63 63 125 31 63 63 63 125
HRRT 63 63 125 250 500 63 63 125 250 500 63 125 125 500 500
7.5:1 Gemini-TF NA NA NA NA NA 125 125 125 125 250 125 125 250 250 500
Vereos 31 63 125 125 250 31 63 125 125 250 63 63 125 125 250
710 63 63 63 250 250 63 63 125 250 250 63 63 125 250 250
mCT 63 63 125 125 250 63 63 125 125 250 63 63 125 125 125
HRRT 125 125 500 500 500 125 125 250 500 500 125 125 250 500 500
3.75:1 Gemini-TF NA NA NA NA NA 250 250 250 500 500 250 500 500 500 500
Vereos 125 125 250 250 500 125 125 250 250 250 125 250 250 250 250
710 125 125 250 500 1000 125 125 250 500 500 125 125 250 250 500
mCT 125 250 250 500 500 125 250 250 500 500 125 250 250 250 500
HRRT 250 500 1000 1000 NSV 250 500 1000 1000 NSV 500 500 1000 1000 NSV
1.85:1 Gemini-TF NA NA NA NA NA 500 1000 2000 2000 NSV 1000 2000 2000 2000 2000
Vereos 500 500 500 1000 2000 500 1000 1000 1000 2000 500 1000 1000 1000 2000
710 500 1000 2000 1000 NSV 500 500 2000 NSV NSV 500 500 1000 1000 NSV
mCT 500 1000 1000 1000 2000 500 1000 1000 1000 2000 500 1000 1000 1000 2000
HRRT 1000 NSV NSV NSV NSV 2000 2000 NSV NSV NSV 2000 NSV NSV NSV NSV
  1. Tabulated are the volumes in units of microliters of the smallest observed sphere for each imaging condition of signal to noise, scan time, and image voxel size for each of the file PET systems. NA or not applicable is used when no data for that setting was recorded and NSV or no sphere visible is used when none of the spheres were visible.